Why would southern slaveholders want to keep slaves from learning to read and write?

because if they couldn't read or write then their slaveowners would be smarter than them and therefor have more control over them

Explanation:

he was able to speed up production of the processing of seeds

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.